Machine element.



C. A. CARLSON.

. MACHINE ELEMENT. APPLIUATION FILED JULY 11.1909.

- Patented sept. zo, 1910:

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INYENTOR f MAT BNEYS raN. D. c

Tug Molilli "uns c UNTTED sTATEs PATENT OFFICE.

CHARLES A. CARLSON, OF BROOKLYN, NEW YORK, ASSIGNOR TO CARLSONMOTOR & TRUCK COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A. CORPORATION OF NEW YORK.

MACHINE ELEMENT.

, "To all whom 'it may concern.'

Be it known that I, CHARLES A. CARLSON, a citizen of the United States of America, and a resident of the borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Machine Elements, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to improvements `in machine elements, and particularly to a novel form and construction of connecting rods. v

Specifically my invention consists in a novel form and construction of bearing connection for opposed connecting` rods whereby the connecting rods are caused to engage a crank pin or similar device in line with each other, and in a means for adjusting the said connection.

The object of my invention is to provide a uniform balanced bearing connection between directly opposed connecting rods and` the crank pin, to simplify the manufacture and reduce the cost thereof, to facilitate the assemblage and removal of the parts, and to simplify the means by which adjustment may be made for taking up wear.

In order that my invention may be thoroughly understood, I will now proceed to i. describe an embodiment thereof, having reference to the accompanying drawings illustrating the same.

In the drawings: Figure 1 is a view in central longitudinal section through an opposed cylinder engine showing a connecting rod construction constituting an embodiment of my invention. Fig. 2 is a top view of the inner bearing members of the connecting rod and the crank pin which they engage. Fig. 3 is a view in central vertical longitudinal section through the parts shown in Fig. 2. Fig. 4 is a detail detached view of one of the bearing members employed.

The connecting rod construction which forms the subject of the present invention may, of course, be employed in various connections, but the particular purpose for which I have designed it is for use in connection with opposed cylinder internal combustion engines, and for the purpose of illus- Specification of Letters Patent.

Application led July 17, 1909.

Patented Sept. 20, 1910.

Serial No. 508,090.

trating the same in use I have, in the presyent drawings, shown the same as applied to the well-known Carlson type of internal combustion engine, such as 1s disclosed in U. S. Letters Patent No. 797 ,555 of August 22, 1905.

The engine comprises a central hollow box-like casing 5, a removable cover plate 6 therefor, overhanging cylinders 7--7 supported by the casing, pistons 8 mounted in the said cylinders, a central crank shaft 9, connecting rods 10-11 connecting the said pistons with a cranked portion 12 of the said shaft, valve mechanism 13 carried by the cylinders, and valve operating mechanism including a cam shaft 14 and cam followers 15, carried by the removable cover plate 6 and removable therewith.

The connecting rods 10 and 11 are each provided at their ends contiguous the crank pin 12 with bearing elements which engage the said crank pin. These elements each comprise a tubular segment 16 and outwardly projecting flanges 17, the said flanges being provided for the purpose of securing the said bearing elements to the forked'ends 18 of the said connecting rods; the flanges may be conveniently so secured by means of iush rivets 19, as is shown. The two tubular segments 16 each embrace less than one-half the circumference of the crank pin 12, as will be readily understood by reference to the drawings, and particulai-1y to Fig. 3. Fitted to the portion of the bearing elements contained between the flanges 17 is a strap comprising two members 20-21. These two strap members are hinged together by means of a pivot pin 22, the said pivot pin passing through the forked end of the connecting rod 11 whereby the two strap members are not only hinged together butare also hinged to the said connecting rod 11. At the opposite or free ends the said strap members are secured to-V at the same time the strap actsto hold thebearing elements close to the bearing sur face of the said crank pin.

For the purpose of adjusting the parts to take up wear it is only necessary to adjust the single bolt and nut 23; if the shims 24 be employed one or more of these shims may be removed to compensate for wear and the bolt and nut ,again tightened vnp. It will also be seen that the manipulation of this single bolt and nut is all vthatl is necessary to assemble and disassemble these parts, thisbeing a great convenience in manufacturing a'nd in repairing. -Theftwo `bearing elements are preferably madeas a part sep'- arate from the connect-ing rod ends, )and thereafter attached thereto as a convenience in manufacture. The two tubular portions lconstitute segments of atube which may, in fact, be formed by cutting away portions of fa complete tube. The outside of this -tube may readily be finished onzthe outside in alathe, andthe inside maybe bored out, wherebyto finish the'outer and inner bearing surfaces Yso that they will betrue and easily fitted `tothe crank pin and'strap respectively. After the-turning operation has been completed the tube ,may-be cut apart and portions removed so that the tubular segments which remain are each arranged'to 'cover less than one-half of the vcircumference ofthe crank pin, and the segments may then be secured to the connecting rodsby riveting in-.themanner above set forth.

The two strap lmembers 20-21, which may be readily removed and replaced by the mere removal and insertion ofthe pivot pin 22, may be secured together and so bored in a lathe lfor the purpose of'making the internal bearingv surfaces .true .with lthe outer bearing surfaces of the'tubular segments.l

It will alsobe noticed that with this form of connection the two connecting rods are arranged exactlyT opposite to each other, are entirely similar in every manner, and the thrust of the two connecting rods is exactly` in aline.

rhat I claim is:

1. The combination with a crank pin, of opposed connecting rods ,having forked ends and 'each provided with a bearing element of tubular segmental form, hinged'strap ele ments surrounding the said bearing elements between the forkedl ends of the connecting rods, and adjustable means for securingthe free ends of the hinged strap elements `together.

2. 'I he combination with a crank pin, of

vopposed connecting rods having forked ends and each v'provided with/a bearing element of'tubular segmental form, hinged strap elements surrounding the vsaid bearing ele-v `ing the strap portions ments between `the forked ends of the connecting rods, and pivotally connected to one of the said connecting rods.

3. The combinationv with a crank pin,of opposed connecting rods havingforke'dends, a tubular segmentaly bearing element for each said connecting rod and means for fastening it thereto, hinged strap `elements surrounding the said bearing elements between the said forked ends of the connecting rods, and means for securing the free ends of the hinged strap elements together.

4. The combination with a crank pin, of opposed connecting rods having forked ends, bearing elements for the connecting/rods, eachbearing element comprising a tubular segment .having vlflanges which extend y outi ward therefrom, means :for securing the flanges ofeach segment tothe forked end of its Iconnecting. rod, a hinged strap pivotally connected to one of the connecting rodsand surrounding the portions of the tubular segments lying between the .flanges thereof, and means forsecuring the free ends of the hinged strap together.

5. The combination with a crankpin, of

` opposed connecting rods havingforked ends,

bearing elements `for the connecting rods, each bearingelement comprising a tubular segment .having flanges which extend outward therefrom, means `for securing the flanges of `each segment to the forked end of its connecting rod, two strap portions which embrace the said bearing members at points intermediate their ends, a hinge pin `for pivotally connecting the two said strap connecting rod ends, and means for connecttogether at their opposite ends. y'

6. The combination with a crank pin, of opposed connecting rods having forkedends, bearing elements for the connecting rods,

`portions together and to oneof the said each bearing element comprising a tubular y segment having flanges which extend outward therefrom, the said flanges being fitted to the forked ends of the connecting rods respectively and vriveted thereto, two strap portions which encircle the said tubular segment-s between the said flanges, a hinge pin received by the two said straps and .bythe forked end of one of -the connecting rods,

whereby the said strap portionsare pivoted Atogether and to the said connectingrod, ,and a bolt and nut `for securing'the. freeends of the strap portions together between the forked end of the other connecting rod.

pF.' B. GRAVES, J. C. IjIanTMANN, 

